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Train-induced unsteady airflow effect analysis on a subway station using field experiments and numerical modelling

机译：基于现场试验和数值模拟的地铁车站列车非定常气流效应分析

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摘要

In recent years, subway systems (rail transit) have become an increasingly significant means of urban transportation. Platform screen doors (PSDs) can play an important role in enhancing the thermal environment in subway stations. However, train-induced unsteady airflow results in unorganised ventilation at the entrances (supplying fresh air and causing heat exchange) and air infiltration at the PSDs (causing heat exchange) in subway stations with PSDs. In the present study, field experiments (in Xi'an, China) and numerical modelling were conducted to investigate the rate of air inflow at the entrances and the PSDs of subways. The accuracy of the model was verified using the results from field experiments. In addition, the effects of various factors such as the traffic density, the piston vent shaft at the station downstream location (PVSASDL), and the season were analysed. The simulation results showed that turning on the PVSASDL could reduce the rate of air inflow at the entrances to 29.2-93.8%, while that at the PSDs could be enhanced to 121.8-126.3% under different traffic densities. In addition, to explore appropriate control of the PVSASDL in winter, different outdoor temperatures were simulated for a traffic density of 12 pairs/hour. It was found that the temperature in the station could meet the standard requirements when outdoor temperatures were greater higher than -5 degrees C with either open or closed PVSASDL conditions. (C) 2018 Elsevier B.V. All rights reserved.
机译：近年来，地铁系统（铁路运输）已成为越来越重要的城市交通手段。站台屏蔽门（PSD）在改善地铁站的热环境方面可以发挥重要作用。但是，火车引起的不稳定气流会导致地铁站入口处的通气不规则（供应新鲜空气并引起热交换），而PSD处的PSD处的空气渗透（引起热交换）。在本研究中，进行了现场试验（在中国西安）和数值模拟来研究地铁入口处的空气流入速率和PSD。使用现场试验的结果验证了模型的准确性。此外，分析了各种因素的影响，例如交通密度，车站下游位置的活塞通风口轴（PVSASDL）和季节。仿真结果表明，在不同的交通密度下，打开PVSASDL可以将入口处的空气流入率降低至29.2-93.8％，而将PSD处的空气流入率提高至121.8-126.3％。此外，为了探索冬季对PVSASDL的适当控制，模拟了12车/小时的交通密度下的不同室外温度。发现在开放或封闭PVSASDL条件下，室外温度高于-5摄氏度时，站内温度可以满足标准要求。 （C）2018 Elsevier B.V.保留所有权利。

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  • 来源
    《Energy and Buildings》 |2018年第9期|228-238|共11页
  • 作者

    Zhang Xin; Ma Jiangyan; Li Angui; Lv Wenchao; Zhang Wenrong; Yang Changqing; Deng Baoshun;

  • 作者单位

    Xian Univ Architecture & Technol, Sch Environm & Municipal Engn, Xian 710055, Shaanxi, Peoples R China;

    Xian Univ Architecture & Technol, Sch Environm & Municipal Engn, Xian 710055, Shaanxi, Peoples R China;

    Xian Univ Architecture & Technol, Sch Environm & Municipal Engn, Xian 710055, Shaanxi, Peoples R China;

    Xian Univ Architecture & Technol, Sch Environm & Municipal Engn, Xian 710055, Shaanxi, Peoples R China;

    Xian Univ Architecture & Technol, Sch Environm & Municipal Engn, Xian 710055, Shaanxi, Peoples R China;

    Xian Univ Architecture & Technol, Sch Environm & Municipal Engn, Xian 710055, Shaanxi, Peoples R China;

    China Railway First Survey & Design Inst Grp LTD, Xian 710043, Shaanxi, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Train-induced unsteady airflow; Platform screen doors; Traffic density; Piston vent shaft; Air inflow rate;

    机译：列车引起的不稳定气流;平台屏蔽门;交通密度;活塞通风孔;空气流入量;

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